Changes in the visually evoked response during treatment for amblyopia in a uniocular patient.

Changes occurred in the visually evoked response (VER) during treatment for amblyopia in a uniocular patient. The VER changed before the visual acuity. After-image treatment was used to teach central fixation and this was maintained with the use of television chequerboards. The patient's visual acuity improved from 4/60 to 6/12 and this was confirmed by the evoked responses.